Maybe consider https://metacpan.org/pod/distribution/IUP/lib/IUP.pod#GetParam

Like: 

perl -MIUP -E '($status, $val) = IUP->GetParam("Title", undef, "String: %s\n", "test"); say $val'

In reply to Re^2: Easiest Simple GUI for standard input by Anonymous Monk
in thread Easiest Simple GUI for standard input by Anonymous Monk

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